Airtac SAIJ80 Adjustable Cylinder SAIJ80AX40-20
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX40-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX40-20
The AirTAC SAIJ80X40-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 25 mm piston rod and delivers 2513 N of push force at 0.5 MPa. The integrated rear stopper allows you to trim the nominal 40 mm stroke back by up to 20 mm, creating a precise 20 to 40 mm usable travel window for exact end-position tuning.
This variant uses a SUS420J2 stainless steel rod for improved corrosion resistance and is built without a magnet. It features PT tapered port threads (G3/8) and accepts the standard SAIJ mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2. The rear screw acts purely as a mechanical stop to define the travel limit and does not lock the load without continuous air pressure.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX40-20 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX40-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX40-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX40-20 Is Used
Precision Clamping
Dial in the exact clamping depth on machined parts by adjusting the rear stopper between 20 and 40 mm without changing the cylinder.
Machine Changeover
Quickly adapt end-of-stroke positions on packaging lines when switching between different product sizes or package heights.
Short-Stroke Pressing
Utilize the 2513 N push force at 0.5 MPa for high-force pressing tasks where the final bottoming position needs micro-adjustments.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX40-20 the Right Cylinder?
Select this 80 mm bore actuator when an application demands high thrust in a compact footprint but requires variable end-stop positioning. It yields 2513 N push force at 0.5 MPa, offering a substantial step up from the 50 mm bore (982 N) while fitting the same ISO 15552 mounting interface. The adjustable stroke is perfect for machine setups requiring frequent product changeovers, eliminating the need to physically swap cylinders to achieve a different stroke length.
Because the nominal stroke is only 40 mm, side-loading risks are minimal, though the robust 25 mm rod further enhances durability against offset loads. To replace an existing cylinder, match the 80 mm bore, 40 mm stroke, 20 mm adjustment range, PT G3/8 port, and mounting style. Note that if true load-holding is required without live air pressure, you must use an external rod lock or pilot-operated check valve, as the rear adjuster is strictly a travel stop.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX40-20 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke from its nominal 40 mm down to 20 mm. This provides a 20 to 40 mm adjustable travel window for fine-tuning the end position during commissioning.
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